题目内容

脱式能简要简
1
5
÷[(
2
3
+
1
5
)×
1
13
]
1
13
-
1
13
×
1
2
+
1
13
÷2
98
99
×98
7
9
÷
11
5
+
2
9
×
5
11
+
5
11
÷
1
10
(1)
1
5
÷[(
2
3
+
1
5
)×
1
13
]
=
1
5
÷[
13
15
×
1
13
],
=
1
5
÷
1
15

=3;

(3)
1
13
-
1
13
×
1
2
+
1
13
÷2
=
1
13
-
1
13
×
1
2
+
1
13
×
1
2

=(1-
1
2
+
1
2
)×
1
13

=1×
1
13

=
1
13


(3)
98
99
×98
=
98
99
×(99-1),
=
98
99
×99-
98
99
×1,
=98-
98
99

=97
1
99


(4)
7
9
÷
11
5
+
2
9
×
5
11
+
5
11
÷
1
10

=
7
9
×
5
11
+
2
9
×
5
11
+
5
11
×10,
=(
7
9
+
2
9
+10)×
5
11

=(1+10)×
5
11

=11×
5
11

=5.
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